Indicator jaw gauge



Jue 2l, 1932.

` AscHRAvEN INDICATOR JAW GAUGE Filed Jan. 29, 1930 Fig. 4.

Patented June 21, 1932 UNi'rED s'rAas PATENT- lori-ica ALEXANDERsci-IEAVEN, or EssEmaEnMANY, AssIGNoR 'ro FRIED. ERUPP AKTIEN-GESELLSCHAFT, or' EssEN-oN-rnE-nunn, GERMANY marcaron JAW GananApplication med January 29, 1930, Serial No. 424,346', and in GermanyFebruary 11, 1929.

This invention relates to an indicator jaw gauge which permanently mayremain on the work piece duringmachining and always adjusts itselfautomatically to the correct measuring position.

gauge,

lin order that my invention can be more readily understood, anembodiment of the same is illustrated by way of example in the drawingwhich accompanies and forms part Aof this specification. In this drawingFigure l is a sectional view of the entire Figure 2 is a section on line2-2 of Figure 1, seen from above, and

Figure 3 is a section on line 3 3 of Figure l, likewise seen from above.

The gauge possesses a jaw frame a, the

jaws of which are rigid relatively to one another, and on the one end ofwhich is mounted a feeling lever mechanism b While its other end carriesan anvil c. This anvil -can be dis- A placed in the measurin directionby means of a knurled nut d and xed by a clamp piece e. Centering of thegaige is made possible by a centering block f that can bev displaced bymeans of a lever h against the action of a spring e' andwith'in which isguided` a gauging bolt g. The latter is in operative connection with thefeeling lever mechanism b. i

After the centering block f has been lifted by depressing lever h,`theauge is slid on the shaft to be measured. released, Ithe spring z'firmly presses the block f on to the shaft so that the gauge centers Iitself automatically, that means the gauging bolt g and the anvil c areexactly diametrally opposite to one another.

The described'gauge warrants full security of measurement, because owingto the provision of aspring-iniiuenced centering block three points cometo abut with certainty on the piece to be measured. During machining thegauge permanently remains `in operatlve position on the work piece andis held therein by means of any suitable appliance (not shown) thatadmits all required motions. Whatl'. claim and ters Patent, is:-

- hen lever k is desire to secure by liet- A gauge ofthe class describedcomprising a frame forming two jaws rigid relatively to one another, ananvil mounted on one of said jaws, a shiftable spring-influencedcentering block and a gauging boit mounted on theV ALEXANDER SCHRAVEN.

